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Distribution, timing and origin of magmatism in the Bight and Eucla basins, with implications for hydrocarbon prospectivity

Abstract

The breakup of Gondwana during the Mesozoic resulted in widespread basin formation along Australia's southern margin, of which
the Bight Basin is a component. In contrast to many other extensional margins, the Australian southern margin has been classified
as a non-volcanic rifted margin, despite the reported occurrence of scattered volcanic and intrusive rocks in the geological
literature. Public release of the Flinders 2D seismic survey data in the Bight Basin has allowed the accurate mapping of widespread
sills, dykes, lava flows and volcanoes.